const DoublyLinked = require('./DoublyLinked');
module.exports = function () {
  let list = new DoublyLinked();
  list.append('a').append('b').append('c').append('d').append('e').append('f');
  console.log(list.remove('c'));
  console.log(list.forwardString());
  console.log(list.backwardString());
  console.log(list.length);
};
